Device for inserting explosive charges in earth.



E. K. OBRIEN. DEVICE FOR msunme EXPLOSIVE CHARGES m EARTH.

Patented Nov. 20, 1917..

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7 APPLICATION FILED FE,B- B. 1917 i s all mama may concern 1 cation.

' irnn sTATs TET orrion.

EDWIN K. OBRIEN, OIF CHARLOTTESVILLE, VIRGINIA.

DEVICE FOR INSERTING EXPLOSIVE CHARGES IN EARTH.

RBef it known thatLEDwiN K. OBiRIElN, a citizen of the United States, residing at gharlottesville, the county of Albem arle I] d State of Virginia,have invented certain new and useful Improvements in Devices for Inserting Explosive Charges in Earth, ofiwhich' the following is a specifi- This invention relates to devices for inand exploding explosive charges in the earth, for the purpose of loosening and moving theearth bythe action of the eX- Qplosive, or for rendering the earth in condition to be easily taken out, 'in order that cavities may be created in which to plant trees or the like, or for the erection of fence "posts, or for the excavation of ditches for 25. illustrated the construction and arrangewhatso'ev er use desired.

The object of this invention is the production ofvery simple, cheap and readily manipulated devices for the uses stated, and, having parts of special construction and arrangement with relation to each other.

In the accompanying drawlngs there are ment of the parts as preferred in this inventlon, and Figure lrepresents a side vlew of the parts assembled before driving into the earth. Fig. 2 is a like view with the nose or point of the drill started into the earth. Fig. 3 is a side view showing the casing after it has been driven into the earth a showing the casin and the drill withdrawn. Fig. 4 is alike view showing the casing in the earth with the drill-taken out and the cartridge in place upon the internal shoulder at the bottom of the casing. Fig. 5 is a side view in the earth, the cartridge in place, an the drill raised into fir- 'ing position and the upper end of the drill supported above the upper end of the easing by the removable clip attached to the firing cord. Fig. 6 is a cross section upon the broken line 66 of Fig. 5 showing the removable clip in place clasping the drill shank.

Throughout this description and drawings the same letter is used to refer to the same part.

Considering the drawings, the drill A has the head a and point B. The head of the drill is of greater diameter than the interior of the casing C within which the drill is re movably located as illustrated. The drill islonger than the casing C. As usually conto be driven into the earth.

Specification of Letters Patent. Patented NOV. 20, 1917.

Application filed'February 8, 1917. Serial No. 147,345;

0 at the top, and an internal shoulder D at the bottom. f i

In Fig. 1 the point of the drill within the casing is shoi-v'n at the ground line 6 ready Fig. 2 shows the drill started into the earth, and the head a of the drill in contact withthe collar 0 of the casing C. If the drill be now driven farther into the earth the casing is carried with it. At any suitable depth such as is set out in Fig. 3, the drill may be removed and the casing C left in the earth. By reason of the fact that the drill is longer than thecasing, a cavity E lS fEOIIDQd below the casing in the ground. Into the cavity E the cartridge 6 is placed, and, the internal shoulder D of the casing serves to center the cartridge, which is theyfilnction intended.

To avoid accidents the cartridge is fired froma distance, and the means for acc0mplishing the firing are set out in Figs. 5 and 6. A spring clip F, usually made of sheet metal, has an upwardly-extended finger or projection f, and when the clip clasps the upper portion of the shank of the drill the finger 7 passes under the head a. The clip rests upon the collar 0 of the casing and, as the upper portion of the drill is thus supported above the upper end of the casing, the point B of the drill within the casing is raised to a distance above the primer of the cartridge. The lanyard or firing cord G is secured to the clip In the operation of this invention, the parts are first assembled and arranged as illustrated in Fig. 1. Then, the drill is driven into the earth until the head of the drill meets the collar or rim of the casing. Further driving carries the casing down also. The drill is then withdrawn, and, as the drill is longer than the casing a cavity E is formed below the lower end of the casing. Into this cavity the cartridge is introduced, and the rim of the cartridge rests upon and the cartridge is centered by the internal shoulder D at the bottom of the casing. Next, the drill is introduced and the clip F placed upon the upper part of the shank with the fingers f under the head of the drill. In that way the point of the drill within the casing is raised some distance above the primer of the cartridge. A pull upon the lanyard G from a distance drops the drill upon the cartridge and the explosion takes place as will be readily underand to fully loosen" the earth 'abou't'the casing',,if the explosive is oftthe proper amount ,tioular kind of explosive, or to the size .501

- N form of the cartridge. It has'been found i P ctic when using this invention preparatory, to setting out fruit trees, that "by selecting the V proper size I. cartridges,=j the jiearth is loosened suffieientlyto permit the i easy removal ofthe casing and drillrneitherof' whiohis blownout by theiexplosion, and

' the purpose desired.

co pies o t this patent may be obtained for -i Having now deser'bed this invention, explained the mode of its operation, hat I claim is':

-1. In an explosiiie inserter 'and exploder :the combination ith a casing; of a 7 drill arranged movably Withinthecasing andhaving greaterllengththan the'toasing'and a head greater inidiameter than' theinteriorof the casirlg, the said casing having an -.in-'

ternal shoulder "at. the bottom.

. 2. 'In an explosive lnserter and exploder,

- the combination with a casing, the said casstood. Usually, the result is to form a mu'ch" enlarged cavity. at the bottom of thelcasing,

ranged removably withing the casing and having; greater lengthithan "the,';casing" and a head greater in diameterfthan 'th'e -interior e th I a-i a in ai di as ble ea e ling upon the cas ng; and-upon" the drill Lto 7 i support the upper end of the drill above the fto .takeputthe earth to an extentarnple for l W 4. I i1 an;ekjpidsik :i ei tiandfex ibd i; the combination with aTcasi'ngg'of a drill ar- -jranged' removably ithin 7 the saidflcasing r ing-"having a reinforced rimQof a drill; ar-

ofthe said casing, the said casing having an internalshoulder at the bottom; 4 i j a ,3, In an explosive inserter and exploder, fthecombination with a casing ofa drill ar-- and hai ing greater length-than .fllejljeasing and a headgreater in diainet'erithan the iiiflterior of. the saidasing, ,greleasablef' means i acting upon th'e' said drill and upon the said casing to support theguppe'r end or the drill abovethe casing, and devioesf aoting' upon the said dri11 supporting"n1eans' for" releasing the same from aidis'tance.

I In testimony whereof 'I aflixniy signature.

' a EDWIN OBRIEN;

five cents each, by addressing the' fcoxninissioner of rims 7v washh lgtoy p gg i I p l I p V ,,-l 

